summaryrefslogtreecommitdiff
path: root/Build/source/texk/web2c/luatexdir/pdf/pdfpage.c
diff options
context:
space:
mode:
Diffstat (limited to 'Build/source/texk/web2c/luatexdir/pdf/pdfpage.c')
-rw-r--r--Build/source/texk/web2c/luatexdir/pdf/pdfpage.c565
1 files changed, 565 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/luatexdir/pdf/pdfpage.c b/Build/source/texk/web2c/luatexdir/pdf/pdfpage.c
new file mode 100644
index 00000000000..783eabda742
--- /dev/null
+++ b/Build/source/texk/web2c/luatexdir/pdf/pdfpage.c
@@ -0,0 +1,565 @@
+/* pdfpage.c
+
+ Copyright 2006-2009 Taco Hoekwater <taco@luatex.org>
+
+ This file is part of LuaTeX.
+
+ LuaTeX is free software; you can redistribute it and/or modify it under
+ the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 2 of the License, or (at your
+ option) any later version.
+
+ LuaTeX is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+ License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with LuaTeX; if not, see <http://www.gnu.org/licenses/>. */
+
+/* $Id: pdfpage.c 2046 2009-03-17 20:06:05Z hhenkel $ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+#include <math.h>
+
+#include "ptexlib.h"
+
+static const char __svn_version[] =
+ "$Id: pdfpage.c 2046 2009-03-17 20:06:05Z hhenkel $ $URL: http://scm.foundry.supelec.fr/svn/luatex/trunk/src/texk/web2c/luatexdir/pdf/pdfpage.c $";
+
+#define lround(a) (long) floor((a) + 0.5)
+#define setpdffloat(a,b,c) {(a).m = (b); (a).e = (c);}
+#define pdf2double(a) ((double) (a).m / exp10[(a).e])
+
+/* eternal constants */
+#define one_bp ((double) 65536 * (double) 72.27 / 72) /* number of sp per 1bp */
+#define e_tj 3 /* must be 3; movements in []TJ are in fontsize/10^3 units */
+
+/* definitions from luatex.web */
+#define pdf_font_blink(a) font_tables[a]->_pdf_font_blink
+
+pdfstructure *pstruct = NULL;
+
+static long *exp10 = NULL;
+
+/**********************************************************************/
+
+static pdfstructure *new_pdfstructure()
+{
+ return xmalloc(sizeof(pdfstructure));
+}
+
+static void calc_k1(pdfstructure * p)
+{
+ p->k1 = exp10[p->pdf.h.e] / one_bp;
+}
+
+static void calc_k2(pdfstructure * p)
+{
+ p->tm[0].m =
+ lround(pdf2double(p->hz) * pdf2double(p->ext) * exp10[p->tm[0].e]);
+ p->k2 =
+ exp10[e_tj +
+ p->cw.e] / (exp10[p->pdf.h.e] * pdf2double(p->fs) *
+ pdf2double(p->tm[0]));
+}
+
+void pdf_page_init()
+{
+ pdfstructure *p;
+ int i, decimal_digits = fixed_decimal_digits;
+ if (exp10 == NULL) {
+ exp10 = xmalloc(10 * sizeof(long));
+ exp10[0] = 1;
+ for (i = 1; i < 10; i++)
+ exp10[i] = 10 * exp10[i - 1];
+ }
+ if (pstruct == NULL)
+ pstruct = new_pdfstructure();
+ p = pstruct;
+ setpdffloat(p->pdf.h, 0, decimal_digits);
+ setpdffloat(p->pdf.v, 0, decimal_digits);
+ p->cw.e = 1;
+ p->fs.e = decimal_digits + 2; /* "+ 2" makes less corrections inside []TJ */
+ setpdffloat(p->hz, 1000, 3); /* m = 1000 = default = unexpanded, e must be 3 */
+ setpdffloat(p->ext, 1000, 3); /* m = 1000 = default = unextended, e must be 3 */
+ /* for placement outside BT...ET */
+ setpdffloat(p->cm[0], 1, 0);
+ setpdffloat(p->cm[1], 0, 0);
+ setpdffloat(p->cm[2], 0, 0);
+ setpdffloat(p->cm[3], 1, 0);
+ setpdffloat(p->cm[4], 0, decimal_digits); /* horizontal movement on page */
+ setpdffloat(p->cm[5], 0, decimal_digits); /* vertical movement on page */
+ /* for placement inside BT...ET */
+ setpdffloat(p->tm[0], exp10[6], 6); /* mantissa holds HZ expand * ExtendFont */
+ setpdffloat(p->tm[1], 0, 0);
+ setpdffloat(p->tm[2], 0, 3); /* mantissa holds SlantFont, 0 = default */
+ setpdffloat(p->tm[3], 1, 0);
+ setpdffloat(p->tm[4], 0, decimal_digits); /* mantissa holds delta from pdf_bt_pos.h */
+ setpdffloat(p->tm[5], 0, decimal_digits); /* mantissa holds delta from pdf_bt_pos.v */
+ /* */
+ p->f_cur = null_font;
+ p->f_pdf = null_font;
+ p->wmode = WMODE_H;
+ p->mode = PMODE_PAGE;
+ calc_k1(p);
+}
+
+/**********************************************************************/
+
+#ifdef SYNCH_POS_WITH_CUR
+/* some time this will be needed */
+synch_pos_with_cur(scaledpos * pos, scaledpos * cur, scaledpos * box_pos)
+{
+ switch (dvi_direction) {
+ case dir_TL_:
+ pos->h = box_pos->h + cur->h;
+ pos->v = box_pos->v - cur->v;
+ break;
+ case dir_TR_:
+ pos->h = box_pos->h - cur->h;
+ pos->v = box_pos->v - cur->v;
+ break;
+ case dir_BL_:
+ pos->h = box_pos->h + cur->h;
+ pos->v = box_pos->v + cur->v;
+ break;
+ case dir_BR_:
+ pos->h = box_pos->h - cur->h;
+ pos->v = box_pos->v + cur->v;
+ break;
+ case dir_LT_:
+ pos->h = box_pos->h + cur->v;
+ pos->v = box_pos->v - cur->h;
+ break;
+ case dir_RT_:
+ pos->h = box_pos->h - cur->v;
+ pos->v = box_pos->v - cur->h;
+ break;
+ case dir_LB_:
+ pos->h = box_pos->h + cur->v;
+ pos->v = box_pos->v + cur->h;
+ break;
+ case dir_RB_:
+ pos->h = box_pos->h - cur->v;
+ pos->v = box_pos->v + cur->h;
+ break;
+ default:;
+ }
+}
+#endif
+
+/**********************************************************************/
+
+boolean calc_pdfpos(pdfstructure * p, scaledpos * pos)
+{
+ scaledpos new;
+ int move_pdfpos = FALSE;
+ switch (p->mode) {
+ case PMODE_PAGE:
+ new.h = lround(pos->h * p->k1);
+ new.v = lround(pos->v * p->k1);
+ p->cm[4].m = new.h - p->pdf.h.m; /* cm is concatenated */
+ p->cm[5].m = new.v - p->pdf.v.m;
+ if (abs(p->cm[4].m) >= 1 || abs(p->cm[5].m) >= 1)
+ move_pdfpos = TRUE;
+ break;
+ case PMODE_TEXT:
+ new.h = lround(pos->h * p->k1);
+ new.v = lround(pos->v * p->k1);
+ p->tm[4].m = new.h - p->pdf_bt_pos.h.m; /* Tm replaces */
+ p->tm[5].m = new.v - p->pdf_bt_pos.v.m;
+ if (abs(p->tm[4].m) >= 1 || abs(p->tm[5].m) >= 1)
+ move_pdfpos = TRUE;
+ break;
+ case PMODE_CHAR:
+ case PMODE_CHARARRAY:
+ switch (p->wmode) {
+ case WMODE_H:
+ new.h = lround((pos->h * p->k1 - p->pdf_tj_pos.h.m) * p->k2);
+ new.v = lround(pos->v * p->k1);
+ p->tj_delta.m =
+ -lround((new.h - p->cw.m) / exp10[p->cw.e - p->tj_delta.e]);
+ p->tm[5].m = new.v - p->pdf.v.m; /* p->tm[4] is meaningless */
+ if (abs(p->tj_delta.m) >= 1 || abs(p->tm[5].m) >= 1)
+ move_pdfpos = TRUE;
+ break;
+ case WMODE_V:
+ new.h = lround(pos->h * p->k1);
+ new.v = lround((p->pdf_tj_pos.v.m - pos->v * p->k1) * p->k2);
+ p->tm[4].m = new.h - p->pdf.h.m; /* p->tm[5] is meaningless */
+ p->tj_delta.m =
+ -lround((new.v - p->cw.m) / exp10[p->cw.e - p->tj_delta.e]);
+ if (abs(p->tj_delta.m) >= 1 || abs(p->tm[4].m) >= 1)
+ move_pdfpos = TRUE;
+ break;
+ default:
+ assert(0);
+ }
+ break;
+ default:
+ assert(0);
+ }
+ return move_pdfpos;
+}
+
+/**********************************************************************/
+
+void print_pdffloat(pdffloat * f)
+{
+ char a[24];
+ int e = f->e, i, j;
+ long l, m = f->m;
+ if (m < 0) {
+ pdf_printf("-");
+ m *= -1;
+ }
+ l = m / exp10[e];
+ pdf_print_int(l);
+ l = m % exp10[e];
+ if (l != 0) {
+ pdf_printf(".");
+ j = snprintf(a, 23, "%ld", l + exp10[e]);
+ assert(j < 23);
+ for (i = e; i > 0; i--) {
+ if (a[i] != '0')
+ break;
+ a[i] = '\0';
+ }
+ pdf_printf("%s", a + 1);
+ }
+}
+
+static void print_pdf_matrix(pdffloat * tm)
+{
+ int i;
+ for (i = 0; i < 5; i++) {
+ print_pdffloat(tm + i);
+ pdf_printf(" ");
+ }
+ print_pdffloat(tm + i);
+}
+
+void pdf_print_cm(pdffloat * cm)
+{
+ print_pdf_matrix(cm);
+ pdf_printf(" cm\n");
+}
+
+static void pdf_print_tm(pdffloat * tm)
+{
+ print_pdf_matrix(tm);
+ pdf_printf(" Tm ");
+}
+
+static void set_pos(pdfstructure * p, scaledpos * pos)
+{
+ boolean move;
+ assert(is_pagemode(p));
+ move = calc_pdfpos(p, pos);
+ if (move == TRUE) {
+ pdf_print_cm(p->cm);
+ p->pdf.h.m += p->cm[4].m;
+ p->pdf.v.m += p->cm[5].m;
+ }
+}
+
+static void set_pos_temp(pdfstructure * p, scaledpos * pos)
+{
+ boolean move;
+ assert(is_pagemode(p));
+ move = calc_pdfpos(p, pos);
+ if (move == TRUE)
+ pdf_print_cm(p->cm);
+}
+
+void pdf_set_pos(scaled h, scaled v)
+{
+ scaledpos pos;
+ pos.h = h;
+ pos.v = v;
+ set_pos(pstruct, &pos);
+}
+
+void pdf_set_pos_temp(scaled h, scaled v)
+{
+ scaledpos pos;
+ pos.h = h;
+ pos.v = v;
+ set_pos_temp(pstruct, &pos);
+}
+
+/**********************************************************************/
+
+static long pdf_char_width(pdfstructure * p, internal_font_number f, int i)
+{
+ /* use exactly this formula also for calculating the /Width array values */
+ return
+ lround((double) char_width(f, i) / font_size(f) *
+ exp10[e_tj + p->cw.e]);
+}
+
+void pdf_print_charwidth(internal_font_number f, int i)
+{
+ pdffloat cw;
+ assert(pdf_font_blink(f) == null_font); /* must use unexpanded font! */
+ cw.m = pdf_char_width(pstruct, f, i);
+ cw.e = pstruct->cw.e;
+ print_pdffloat(&cw);
+}
+
+/**********************************************************************/
+
+static void begin_text(pdfstructure * p)
+{
+ assert(is_pagemode(p));
+ p->pdf_bt_pos = p->pdf;
+ pdf_printf("BT\n");
+ p->mode = PMODE_TEXT;
+}
+
+static void end_text(pdfstructure * p)
+{
+ assert(is_textmode(p));
+ pdf_printf("ET\n");
+ p->pdf = p->pdf_bt_pos;
+ p->mode = PMODE_PAGE;
+}
+
+static void begin_charmode(pdfstructure * p)
+{
+ assert(is_chararraymode(p));
+ pdf_printf("(");
+ p->mode = PMODE_CHAR;
+}
+
+static void end_charmode(pdfstructure * p)
+{
+ assert(is_charmode(p));
+ pdf_printf(")");
+ p->mode = PMODE_CHARARRAY;
+}
+
+static void begin_chararray(pdfstructure * p)
+{
+ assert(is_textmode(p));
+ p->pdf_tj_pos = p->pdf;
+ p->cw.m = 0;
+ pdf_printf("[");
+ p->mode = PMODE_CHARARRAY;
+}
+
+static void end_chararray(pdfstructure * p)
+{
+ assert(is_chararraymode(p));
+ pdf_printf("]TJ\n");
+ p->pdf = p->pdf_tj_pos;
+ p->mode = PMODE_TEXT;
+}
+
+void pdf_end_string_nl()
+{
+ if (is_charmode(pstruct))
+ end_charmode(pstruct);
+ if (is_chararraymode(pstruct))
+ end_chararray(pstruct);
+}
+
+/**********************************************************************/
+
+static void goto_pagemode(pdfstructure * p)
+{
+ if (!is_pagemode(p)) {
+ if (is_charmode(p))
+ end_charmode(p);
+ if (is_chararraymode(p))
+ end_chararray(p);
+ if (is_textmode(p))
+ end_text(p);
+ assert(is_pagemode(p));
+ }
+}
+
+void pdf_goto_pagemode()
+{
+ goto_pagemode(pstruct);
+}
+
+static void goto_textmode(pdfstructure * p)
+{
+ scaledpos origin = {
+ 0, 0
+ };
+ if (!is_textmode(p)) {
+ if (is_pagemode(p)) {
+ set_pos(p, &origin); /* reset to page origin */
+ begin_text(p);
+ } else {
+ if (is_charmode(p))
+ end_charmode(p);
+ if (is_chararraymode(p))
+ end_chararray(p);
+ }
+ assert(is_textmode(p));
+ }
+}
+
+void pos_finish(pdfstructure * p)
+{
+ goto_pagemode(p);
+}
+
+/**********************************************************************/
+
+static void place_rule(pdfstructure * p, scaledpos * pos, scaled wd, scaled ht)
+{
+ pdfpos dim;
+ scaledpos tmppos = *pos;
+ goto_pagemode(p);
+ dim.h.m = lround(wd * p->k1);
+ dim.h.e = p->pdf.h.e;
+ dim.v.m = lround(ht * p->k1);
+ dim.v.e = p->pdf.v.e;
+ pdf_printf("q\n");
+ if (ht <= one_bp) {
+ tmppos.v += lround(0.5 * ht);
+ set_pos_temp(p, &tmppos);
+ pdf_printf("[]0 d 0 J ");
+ print_pdffloat(&(dim.v));
+ pdf_printf(" w 0 0 m ");
+ print_pdffloat(&(dim.h));
+ pdf_printf(" 0 l S\n");
+ } else if (wd <= one_bp) {
+ tmppos.h += lround(0.5 * wd);
+ set_pos_temp(p, &tmppos);
+ pdf_printf("[]0 d 0 J ");
+ print_pdffloat(&(dim.h));
+ pdf_printf(" w 0 0 m 0 ");
+ print_pdffloat(&(dim.v));
+ pdf_printf(" l S\n");
+ } else {
+ set_pos_temp(p, &tmppos);
+ pdf_printf("0 0 ");
+ print_pdffloat(&(dim.h));
+ pdf_printf(" ");
+ print_pdffloat(&(dim.v));
+ pdf_printf(" re f\n");
+ }
+ pdf_printf("Q\n");
+}
+
+void pdf_place_rule(scaled h, scaled v, scaled wd, scaled ht)
+{
+ scaledpos pos;
+ pos.h = h;
+ pos.v = v;
+ place_rule(pstruct, &pos, wd, ht);
+}
+
+/**********************************************************************/
+
+static void setup_fontparameters(pdfstructure * p, internal_font_number f)
+{
+ p->f_cur = f;
+ p->f_pdf = pdf_set_font(f);
+ p->tj_delta.e = p->cw.e - 1; /* "- 1" makes less corrections inside []TJ */
+ /* no need to be more precise than TeX (1sp) */
+ while (p->tj_delta.e > 0
+ && (double) font_size(f) / exp10[p->tj_delta.e + e_tj] < 0.5)
+ p->tj_delta.e--; /* happens for very tiny fonts */
+ assert(p->cw.e >= p->tj_delta.e); /* else we would need, e. g., exp10[-1] */
+ p->fs.m = lround(font_size(f) / one_bp * exp10[p->fs.e]);
+ p->hz.m = pdf_font_expand_ratio(f) + exp10[p->hz.e];
+ calc_k2(p);
+}
+
+static void set_textmatrix(pdfstructure * p, scaledpos * pos)
+{
+ boolean move;
+ assert(is_textmode(p));
+ move = calc_pdfpos(p, pos);
+ if (move == TRUE) {
+ pdf_print_tm(p->tm);
+ p->pdf.h.m = p->pdf_bt_pos.h.m + p->tm[4].m; /* Tm replaces */
+ p->pdf.v.m = p->pdf_bt_pos.v.m + p->tm[5].m;
+ }
+}
+
+static void set_font(pdfstructure * p)
+{
+ pdf_printf("/F%d", p->f_pdf);
+ pdf_print_resname_prefix();
+ pdf_printf(" ");
+ print_pdffloat(&(p->fs));
+ pdf_printf(" Tf ");
+}
+
+/**********************************************************************/
+
+static void
+place_glyph(pdfstructure * p, scaledpos * pos, internal_font_number f,
+ integer c)
+{
+ int move;
+ if (f != p->f_cur || is_textmode(p) || is_pagemode(p)) {
+ goto_textmode(p);
+ if (f != p->f_cur)
+ setup_fontparameters(p, f);
+ set_font(p);
+ set_textmatrix(p, pos);
+ begin_chararray(p);
+ }
+ assert(is_charmode(p) || is_chararraymode(p));
+ move = calc_pdfpos(p, pos);
+ if (move == TRUE) {
+ if ((p->wmode == WMODE_H && abs(p->tm[5].m) >= 1)
+ || (p->wmode == WMODE_V && abs(p->tm[4].m) >= 1)
+ || abs(p->tj_delta.m) >= 1000000) {
+ goto_textmode(p);
+ set_textmatrix(p, pos);
+ begin_chararray(p);
+ move = calc_pdfpos(p, pos);
+ }
+ assert((p->wmode == WMODE_H && p->tm[5].m == 0)
+ || (p->wmode == WMODE_V && p->tm[4].m == 0));
+ if (move == TRUE) {
+ if (is_charmode(p))
+ end_charmode(p);
+ assert(abs(p->tj_delta.m) >= 1);
+ print_pdffloat(&(p->tj_delta));
+ p->cw.m -= p->tj_delta.m * exp10[p->cw.e - p->tj_delta.e];
+ }
+ }
+ if (is_chararraymode(p))
+ begin_charmode(p);
+ pdf_print_char(f, c); /* this also does pdf_mark_char() */
+ p->cw.m += pdf_char_width(p, p->f_pdf, c); /* aka adv_char_width() */
+}
+
+void pdf_place_glyph(internal_font_number f, integer c)
+{
+ if (char_exists(f, c))
+ place_glyph(pstruct, &pos, f, c);
+}
+
+/**********************************************************************/
+
+static void place_form(pdfstructure * p, scaledpos * pos, integer i)
+{
+ goto_pagemode(p);
+ pdf_printf("q\n");
+ set_pos_temp(p, pos);
+ pdf_printf("/Fm%d", i);
+ pdf_print_resname_prefix();
+ pdf_printf(" Do\nQ\n");
+}
+
+void pdf_place_form(scaled h, scaled v, integer i)
+{
+ scaledpos pos;
+ pos.h = h;
+ pos.v = v;
+ place_form(pstruct, &pos, i);
+}